Annotations and text margins added.

1 files changed, 464 insertions, 0 deletions

diff --git a/src/PerLine.cxx b/src/PerLine.cxx
new file mode 100644
index 000000000..b90416abb
--- /dev/null
+++ b/src/PerLine.cxx
@@ -0,0 +1,464 @@
+// Scintilla source code edit control
+/** @file PerLine.cxx
+ ** Manages data associated with each line of the document
+ **/
+// Copyright 1998-2009 by Neil Hodgson <neilh@scintilla.org>
+// The License.txt file describes the conditions under which this software may be distributed.
+
+#include <string.h>
+
+#include "Platform.h"
+
+#include "Scintilla.h"
+#include "SplitVector.h"
+#include "Partitioning.h"
+#include "CellBuffer.h"
+#include "PerLine.h"
+
+#ifdef SCI_NAMESPACE
+using namespace Scintilla;
+#endif
+
+MarkerHandleSet::MarkerHandleSet() {
+	root = 0;
+}
+
+MarkerHandleSet::~MarkerHandleSet() {
+	MarkerHandleNumber *mhn = root;
+	while (mhn) {
+		MarkerHandleNumber *mhnToFree = mhn;
+		mhn = mhn->next;
+		delete mhnToFree;
+	}
+	root = 0;
+}
+
+int MarkerHandleSet::Length() const {
+	int c = 0;
+	MarkerHandleNumber *mhn = root;
+	while (mhn) {
+		c++;
+		mhn = mhn->next;
+	}
+	return c;
+}
+
+int MarkerHandleSet::NumberFromHandle(int handle) const {
+	MarkerHandleNumber *mhn = root;
+	while (mhn) {
+		if (mhn->handle == handle) {
+			return mhn->number;
+		}
+		mhn = mhn->next;
+	}
+	return - 1;
+}
+
+int MarkerHandleSet::MarkValue() const {
+	unsigned int m = 0;
+	MarkerHandleNumber *mhn = root;
+	while (mhn) {
+		m |= (1 << mhn->number);
+		mhn = mhn->next;
+	}
+	return m;
+}
+
+bool MarkerHandleSet::Contains(int handle) const {
+	MarkerHandleNumber *mhn = root;
+	while (mhn) {
+		if (mhn->handle == handle) {
+			return true;
+		}
+		mhn = mhn->next;
+	}
+	return false;
+}
+
+bool MarkerHandleSet::InsertHandle(int handle, int markerNum) {
+	MarkerHandleNumber *mhn = new MarkerHandleNumber;
+	if (!mhn)
+		return false;
+	mhn->handle = handle;
+	mhn->number = markerNum;
+	mhn->next = root;
+	root = mhn;
+	return true;
+}
+
+void MarkerHandleSet::RemoveHandle(int handle) {
+	MarkerHandleNumber **pmhn = &root;
+	while (*pmhn) {
+		MarkerHandleNumber *mhn = *pmhn;
+		if (mhn->handle == handle) {
+			*pmhn = mhn->next;
+			delete mhn;
+			return;
+		}
+		pmhn = &((*pmhn)->next);
+	}
+}
+
+bool MarkerHandleSet::RemoveNumber(int markerNum) {
+	bool performedDeletion = false;
+	MarkerHandleNumber **pmhn = &root;
+	while (*pmhn) {
+		MarkerHandleNumber *mhn = *pmhn;
+		if (mhn->number == markerNum) {
+			*pmhn = mhn->next;
+			delete mhn;
+			performedDeletion = true;
+		} else {
+			pmhn = &((*pmhn)->next);
+		}
+	}
+	return performedDeletion;
+}
+
+void MarkerHandleSet::CombineWith(MarkerHandleSet *other) {
+	MarkerHandleNumber **pmhn = &root;
+	while (*pmhn) {
+		pmhn = &((*pmhn)->next);
+	}
+	*pmhn = other->root;
+	other->root = 0;
+}
+
+LineMarkers::~LineMarkers() {
+	for (int line = 0; line < markers.Length(); line++) {
+		delete markers[line];
+		markers[line] = 0;
+	}
+	markers.DeleteAll();
+}
+
+void LineMarkers::InsertLine(int line) {
+	if (markers.Length()) {
+		markers.Insert(line, 0);
+	}
+}
+
+void LineMarkers::RemoveLine(int line) {
+	// Retain the markers from the deleted line by oring them into the previous line
+	if (markers.Length()) {
+		if (line > 0) {
+			MergeMarkers(line - 1);
+		}
+		markers.Delete(line);
+	}
+}
+
+int LineMarkers::LineFromHandle(int markerHandle) {
+	if (markers.Length()) {
+		for (int line = 0; line < markers.Length(); line++) {
+			if (markers[line]) {
+				if (markers[line]->Contains(markerHandle)) {
+					return line;
+				}
+			}
+		}
+	}
+	return -1;
+}
+
+void LineMarkers::MergeMarkers(int pos) {
+	if (markers[pos + 1] != NULL) {
+		if (markers[pos] == NULL)
+			markers[pos] = new MarkerHandleSet;
+		markers[pos]->CombineWith(markers[pos + 1]);
+		delete markers[pos + 1];
+		markers[pos + 1] = NULL;
+	}
+}
+
+int LineMarkers::MarkValue(int line) {
+	if (markers.Length() && (line >= 0) && (line < markers.Length()) && markers[line])
+		return markers[line]->MarkValue();
+	else
+		return 0;
+}
+
+int LineMarkers::AddMark(int line, int markerNum, int lines) {
+	handleCurrent++;
+	if (!markers.Length()) {
+		// No existing markers so allocate one element per line
+		markers.InsertValue(0, lines, 0);
+	}
+	if (!markers[line]) {
+		// Need new structure to hold marker handle
+		markers[line] = new MarkerHandleSet();
+		if (!markers[line])
+			return - 1;
+	}
+	markers[line]->InsertHandle(handleCurrent, markerNum);
+
+	return handleCurrent;
+}
+
+void LineMarkers::DeleteMark(int line, int markerNum, bool all) {
+	if (markers.Length() && (line >= 0) && (line < markers.Length()) && markers[line]) {
+		if (markerNum == -1) {
+			delete markers[line];
+			markers[line] = NULL;
+		} else {
+			bool performedDeletion = markers[line]->RemoveNumber(markerNum);
+			while (all && performedDeletion) {
+				performedDeletion = markers[line]->RemoveNumber(markerNum);
+			}
+			if (markers[line]->Length() == 0) {
+				delete markers[line];
+				markers[line] = NULL;
+			}
+		}
+	}
+}
+
+void LineMarkers::DeleteMarkFromHandle(int markerHandle) {
+	int line = LineFromHandle(markerHandle);
+	if (line >= 0) {
+		markers[line]->RemoveHandle(markerHandle);
+		if (markers[line]->Length() == 0) {
+			delete markers[line];
+			markers[line] = NULL;
+		}
+	}
+}
+
+LineLevels::~LineLevels() {
+}
+
+void LineLevels::InsertLine(int line) {
+	if (levels.Length()) {
+		int level = SC_FOLDLEVELBASE;
+		if ((line > 0) && (line < levels.Length())) {	
+			level = levels[line-1] & ~SC_FOLDLEVELWHITEFLAG;
+		}
+		levels.InsertValue(line, 1, level);
+	}
+}
+
+void LineLevels::RemoveLine(int line) {
+	if (levels.Length()) {
+		// Move up following lines but merge header flag from this line
+		// to line before to avoid a temporary disappearence causing expansion.
+		int firstHeader = levels[line] & SC_FOLDLEVELHEADERFLAG;
+		levels.Delete(line);
+		if (line > 0)
+			levels[line-1] |= firstHeader;
+	}
+}
+
+void LineLevels::ExpandLevels(int sizeNew) {
+	levels.InsertValue(levels.Length(), sizeNew - levels.Length(), SC_FOLDLEVELBASE);
+}
+
+void LineLevels::ClearLevels() {
+	levels.DeleteAll();
+}
+
+int LineLevels::SetLevel(int line, int level, int lines) {
+	int prev = 0;
+	if ((line >= 0) && (line < lines)) {
+		if (!levels.Length()) {
+			ExpandLevels(lines + 1);
+		}
+		prev = levels[line];
+		if (prev != level) {
+			levels[line] = level;
+		}
+	}
+	return prev;
+}
+
+int LineLevels::GetLevel(int line) {
+	if (levels.Length() && (line >= 0) && (line < levels.Length())) {
+		return levels[line];
+	} else {
+		return SC_FOLDLEVELBASE;
+	}
+}
+
+LineState::~LineState() {
+}
+
+void LineState::InsertLine(int line) {
+	if (lineStates.Length()) {
+		lineStates.EnsureLength(line);
+		lineStates.Insert(line, 0);
+	}
+}
+
+void LineState::RemoveLine(int line) {
+	if (lineStates.Length() > line) {
+		lineStates.Delete(line);
+	}
+}
+
+int LineState::SetLineState(int line, int state) {
+	lineStates.EnsureLength(line + 1);
+	int stateOld = lineStates[line];
+	lineStates[line] = state;
+	return stateOld;
+}
+
+int LineState::GetLineState(int line) {
+	lineStates.EnsureLength(line + 1);
+	return lineStates[line];
+}
+
+int LineState::GetMaxLineState() {
+	return lineStates.Length();
+}
+
+static int NumberLines(const char *text) {
+	if (text) {
+		int newLines = 0;
+		while (*text) {
+			if (*text == '\n')
+				newLines++;
+			text++;
+		}
+		return newLines+1;
+	} else {
+		return 0;
+	}
+}
+
+// Each allocated LineAnnotation is a char array which starts with an AnnotationHeader
+// and then has text and optional styles.
+
+static const int IndividualStyles = 0x100;
+
+struct AnnotationHeader {
+	short style;	// Style IndividualStyles implies array of styles
+	short lines;
+	int length;
+};
+
+LineAnnotation::~LineAnnotation() {
+	ClearAll();
+}
+
+void LineAnnotation::InsertLine(int line) {
+	if (annotations.Length()) {
+		annotations.Insert(line, 0);
+	}
+}
+
+void LineAnnotation::RemoveLine(int line) {
+	if (annotations.Length() && (line < annotations.Length())) {
+		delete []annotations[line];
+		annotations.Delete(line);
+	}
+}
+
+bool LineAnnotation::AnySet() const {
+	return annotations.Length() > 0;
+}
+
+bool LineAnnotation::MultipleStyles(int line) const {
+	if (annotations.Length() && (line < annotations.Length()) && annotations[line])
+		return reinterpret_cast<AnnotationHeader *>(annotations[line])->style == IndividualStyles;
+	else
+		return 0;
+}
+
+int LineAnnotation::Style(int line) {
+	if (annotations.Length() && (line < annotations.Length()) && annotations[line])
+		return reinterpret_cast<AnnotationHeader *>(annotations[line])->style;
+	else
+		return 0;
+}
+
+const char *LineAnnotation::Text(int line) const {
+	if (annotations.Length() && (line < annotations.Length()) && annotations[line])
+		return annotations[line]+sizeof(AnnotationHeader);
+	else
+		return 0;
+}
+
+const char *LineAnnotation::Styles(int line) const {
+	if (annotations.Length() && (line < annotations.Length()) && annotations[line] && MultipleStyles(line))
+		return annotations[line] + sizeof(AnnotationHeader) + Length(line);
+	else
+		return 0;
+}
+
+static char *AllocateAnnotation(int length, int style) {
+	size_t len = sizeof(AnnotationHeader) + length + ((style == IndividualStyles) ? length : 0);
+	char *ret = new char[len];
+	memset(ret, 0, len);
+	return ret;
+}
+
+void LineAnnotation::SetText(int line, const char *text) {
+	if (text) {
+		annotations.EnsureLength(line+1);
+		int style = Style(line);
+		if (annotations[line]) {
+			delete []annotations[line];
+		}
+		annotations[line] = AllocateAnnotation(strlen(text), style);
+		AnnotationHeader *pah = reinterpret_cast<AnnotationHeader*>(annotations[line]);
+		pah->style = static_cast<short>(style);
+		pah->length = strlen(text);
+		pah->lines = static_cast<short>(NumberLines(text));
+		memcpy(annotations[line]+sizeof(AnnotationHeader), text, pah->length);
+	} else {
+		if (annotations.Length() && (line < annotations.Length()) && annotations[line]) {
+			delete []annotations[line];
+			annotations[line] = 0;
+		}
+	}
+}
+
+void LineAnnotation::ClearAll() {
+	for (int line = 0; line < annotations.Length(); line++) {
+		delete []annotations[line];
+		annotations[line] = 0;
+	}
+	annotations.DeleteAll();
+}
+
+void LineAnnotation::SetStyle(int line, int style) {
+	annotations.EnsureLength(line+1);
+	if (!annotations[line]) {
+		annotations[line] = AllocateAnnotation(0, style);
+	}
+	reinterpret_cast<AnnotationHeader *>(annotations[line])->style = static_cast<short>(style);
+}
+
+void LineAnnotation::SetStyles(int line, const char *styles) {
+	annotations.EnsureLength(line+1);
+	if (!annotations[line]) {
+		annotations[line] = AllocateAnnotation(0, IndividualStyles);
+	} else {
+		AnnotationHeader *pahSource = reinterpret_cast<AnnotationHeader *>(annotations[line]);
+		if (pahSource->style != IndividualStyles) {
+			char *allocation = AllocateAnnotation(pahSource->length, IndividualStyles);
+			AnnotationHeader *pahAlloc = reinterpret_cast<AnnotationHeader *>(allocation);
+			pahAlloc->length = pahSource->length;
+			pahAlloc->lines = pahSource->lines;
+			memcpy(allocation + sizeof(AnnotationHeader), annotations[line] + sizeof(AnnotationHeader), pahSource->length);
+			delete []annotations[line];
+			annotations[line] = allocation;
+		}
+	}
+	AnnotationHeader *pah = reinterpret_cast<AnnotationHeader *>(annotations[line]);
+	pah->style = IndividualStyles;
+	memcpy(annotations[line] + sizeof(AnnotationHeader) + pah->length, styles, pah->length);
+}
+
+int LineAnnotation::Length(int line) const {
+	if (annotations.Length() && (line < annotations.Length()) && annotations[line])
+		return reinterpret_cast<AnnotationHeader *>(annotations[line])->length;
+	else
+		return 0;
+}
+
+int LineAnnotation::Lines(int line) const {
+	if (annotations.Length() && (line < annotations.Length()) && annotations[line])
+		return reinterpret_cast<AnnotationHeader *>(annotations[line])->lines;
+	else
+		return 0;
+}